99408 ÷ 8 = 12426 R0
We're going to perform division on 99408 with 8 as the divisor.

Step 1:
8 goes into 9 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 8 from 9 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 8

Step 2:
8 goes into 19 2 times with a remainder of 3.
Write down 2 as next digit of of the result. 
Result so far: 12
Subtract 16 from 19 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 8

Step 3:
8 goes into 34 4 times with a remainder of 2.
Write down 4 as next digit of of the result. 
Result so far: 124
Subtract 32 from 34 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 8

Step 4:
8 goes into 20 2 times with a remainder of 4.
Write down 2 as next digit of of the result. 
Result so far: 1242
Subtract 16 from 20 to get 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 8

Step 5:
8 goes into 48 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 12426
Subtract 48 from 48 to get 0.

The final result is 12426 with a remainder of 0.